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96 Camaro OBD2 codes P1860 TCC PWM Solenoid Electrical

I see no problem with shift in trany. Could it be a fuse? If it is the TCC PWM Solenoid. How easy is it to change in valve body. Is there an easy test to see if power is feeding to it??

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  • evilz Dec 27, 2008

    shifts fine but overdrive is weird

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5 Suggested Answers

jturcotte
  • 6812 Answers

SOURCE: 2000 caddy deville 4t80e transmission

Hi, the likely problem is that your torque converter clutch (TCC) solenoid has failed and will no longer engage the clutch. However, it may be worth a try to have your transmission fluid flushed and the filter replaced, if you haven't done that recently. There is some small chance that will fix the problem. The TCC is a device in the transmission that locks the engine to the transmission once you reach highway speeds of at least 25 mph or higher. The purpose of the clutch is to conserve fuel and reduce heat in the torque converter. The car will run fine without the TCC, but will get slightly less highway mileage. There is no harm or safety concern with driving the car as it stands now. However, if you intend to keep this car and drive a lot of highways miles, it may be worth the expense to have it repaired. (you could check your mileage to see how it's doing without the clutch) The repair should be done by a transmission expert, as there are several possible reasons it has failed--I'm only guessing it's the solenoid but would HAVE to troubleshoot to be sure. The repair can be done by any reputable transmission shop--it does not have to be done at the Cadillac/GM dealer. That said, I do recommend you shop around a bit if you want to have the car repaired, as there is considerable variation in the approach to this repair. It is possible to replace the solenoid without removing the transmission, but some shops may claim you need a complete rebuild. Make sure to tell them your trouble codes--that was very helpful to me. Please let me know if you have any questions, and thanks for using FixYa.


Trouble Code: P0741 TCC System Stuck Off - Mechanical (4L80-E)
Possible Causes:

ATF level is too low, or the fluid is burnt or contaminated Inspect transmission lines to radiator for bends or restrictions Oil pressure screen is clogged or debris in the oil pan TCC control valve is stuck "off" due to sediment or binding TCC regulator valve is stuck "off" due to sediment or binding TCC feed valve is stuck "off" due to sediment or binding TCC solenoid valve O-ring or turbine shaft seals leaking or cut


Trouble Code: P1860 TCC PWM Solenoid Circuit Malfunction (4T80-E)
Possible Causes:
TCC solenoid control circuit is open or shorted to ground TCC solenoid control circuit is shorted to system power (B+) TCC solenoid power circuit is open (check the TRANS fuse) TCC solenoid is damaged or has failed PCM has failed

Posted on Jan 03, 2011

MrScary66613
  • 1990 Answers

SOURCE: 1996 tahoe tranny not shifting

The L60E Tranny's were not Covered under this Recall. Therefore, You should be Just fine with a Cleaning and Reassemby. Just to be Absolutely sure, Check Edmonds.com and Enter your Trucks Make year and Model and it will give you the Recalls, Complaints and Service Bulletins for your Truck. Please Rate My Response! Thanks!

Posted on Feb 06, 2009

dennymulford
  • 1055 Answers

SOURCE: 1998 Chevy Cavalier-electical

youve either got a bad connection at the new battery or the power wire is shorting out did he have too pull the cables too get them too fit?

Posted on Feb 27, 2009

stevehinrich
  • 61 Answers

SOURCE: 1997 blazer sluggish in drive reverse is fine

P0740 is TCC circuit malfunction P0753 is shift solenoid A circuit electrical P0758 is shift solenoid B P1406 is EGR pintle position and P01860 is TCC circuit.

Posted on Feb 28, 2009

polarcycle
  • 1392 Answers

SOURCE: I recently had a diagnostics done on my 2000 Isuzu

If it is in the solenoid itself, yes. If it is in the wiring or the computer, no. The only way to tell, is to replace the solenoid and turn off the light. Or do some extensive search in the wiring harness.

Posted on Mar 07, 2009

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I have a 2001 aurora and code p1860 p1860 came up what is this and how much to fix


P1860 All GM - TCC (transmission Torque Converter Clutch) PWM Solenoid Circuit Electrical.
P1860 Description The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control valve body within the transmission. The solenoid receives ignition voltage through circuit 239. The Powertrain Control Module (PCM) controls the solenoid by providing a ground path on circuit 418. Current flows through the solenoid coil according to the duty cycle (percentage of ON and OFF time). The TCC PWM solenoid valve provides a smooth engagement of the torque converter clutch by operating during a duty cycle percent of ON time.
When is the code detected? When the PCM detects a continuous open, short to ground or short to power in the TCC PWM solenoid valve circuit, then DTC P1860 sets. DTC P1860 is a type B DTC.

Possible causes - Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection. Unless you have a factory manual and very good auto repair skills this is best left to an expert. It is a messy dirty job that requires removing the parts inside the transmission for testing..

Aug 23, 2016 | Cars & Trucks

1 Answer

1996 Pontiac firebird v6 3.8L error code p1860 p1860pd p0306 p1460pd changed tcc pwm solenoid code still won't clear others only appear during a 100 mile drive cycle please help!!!


You replaced the TCC solenoid , but did you test the electrical circuit ? Code description - DTC P1860 TCC PWM Solenoid Circuit Electrical. - YOU SEE SOLENOID CIRCUIT ELECTRICAL - no where does it say to replace the solenoid . TEST THE ELECTRICL CIRCUIT ! P0306 should set right away if misfire is present . P0306 cylinder # 6 misfire !
The TCC PWM Solenoid Valve controls the fluid acting on the converter clutch valve, which then controls the application and release of the TCC. The solenoid attaches to the control valve body within the transmission. Circuit 439 supplies ignition voltage directly to the solenoid. The PCM controls the solenoid by providing a ground path on circuit 418. Current flows through the solenoid coil according to the duty cycle (percentage of ON and OFF time). The TCC PWM Solenoid Valve provides a smooth engagement of the torque converter clutch by operating during a duty cycle percent of ON time.
When the PCM detects a continuous open or a short to ground in the TCC PWM circuit or the TCC PWM Solenoid Valve, then DTC P1860 sets. DTC P1860 is a type A DTC.
Diagnostic Aids
?€¢
Inspect the wiring for any poor electrical connections at the PCM. Inspect the wiring at the transmission 20-way connector. Look for the following conditions:


-
A bent terminal


-
A backed out terminal


-
A damaged terminal


-
Poor terminal tension


-
A chafed wire


-
A broken wire inside the insulation


?€¢
When diagnosing for an intermittent short or an open condition, massage the wiring harness while watching the test equipment for a change



2

  1. Install the scan tool.
  2. With the engine OFF, turn the ignition switch to the RUN position.
  3. Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and the Failure Records for reference. The Clear Info function will erase the data.
  4. Record the DTC Freeze Frame and the DTC Failure Records.
Are DTCs P0753, P0758, P1860, P1864, or P1886 set?
--
Go to Step 3
Go to Step 4

3

Inspect circuit 439, the solenoid, the PCM IGN fuse, and the Automatic Transmission Wiring Harness for an open or a short to ground.
Refer to Electrical Diagnosis, Section 8.
Did you find and correct a problem?
--
Go to Step 17
--

4
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the transmission 20-way connector (additional DTCs may set).
  3. Install the J 39775 Jumper Harness on the engine harness connector .
  4. With the engine OFF, turn the ignition switch to the RUN position.
  5. Connect a lest lamp from the J 39775 Jumper Harness connector cavity E to ground.
Does the test lamp illuminate?
--
Go to Step 6
Go to Step 5

5

Repair the open in the ignition feed circuit 439 to the TCC PWM Solenoid Valve. Refer to Electrical Diagnosis, Section 8.
Is the repair complete?
--
Go to Step 17
--

6
  1. Install the test lamp from cavities E to U of the J 39775 Jumper Harness connector .
  2. Using the scan tool, command the TCC PWM Solenoid Valve ON and OFF 3 times.
Does the test lamp illuminate when you command the TCC PWM Solenoid Valve ON, and turn OFF when you command the valve OFF?
--
Go to Step 8
Go to Step 7

7

  1. Inspect circuit 418 for an open.
  2. Inspect circuit 418 for a short to ground.
  3. Repair the circuit if necessary.
Refer to Electrical Diagnosis, Section 8.
Did you find and correct a problem?
--
Go to Step 17
Go to Step 9

8
  1. Install the J 39775 Jumper Harness on the Connector End View 20-way connector.
  2. Using the J 39200 DVOM and the J 35616-A Connector Test Adapter Kit, measure the resistance between terminals E and U.
Is the resistance within the specified range?
10-15ohms
Go to Step 11
Go to Step 10

9

Inspect the PCM connector terminals for the following conditions:
  1. Damaged connector pins
  2. Backed out connector pins
  3. Weak terminal tension
  4. Repair the connectors if necessary.
Did you find and correct a problem?
--
Go to Step 17
Go to Step 16

10

  1. Disconnect the Automatic Transmission Wiring Harness at the TCC PWM Solenoid Valve.
  2. Measure the resistance of the TCC PWM Solenoid Valve.
Is the resistance within the specified range?
10-15ohms
Go to Step 12
Go to Step 15

11

Using the J 39200 DVOM and the J 35616-A Connector Test Adapter kit, measure the resistance between terminal E of the J 39775 Jumper Harness and the transmission case (ground). Measure the resistance between terminal U of the J 39775 Jumper Harness and the transmission case (ground).
Are both readings greater than the specified value?
250ohms
Go to Diagnostic Aids
Go to Step 13

12

  1. Inspect the Automatic Transmission Wiring Harness for an open or short to ground.
  2. Repair the harness if necessary.
Refer to Electrical Diagnosis, Section 8.
Did you find and repair a problem?
--
Go to Step 17
--

13

  1. Disconnect the Automatic Transmission Wiring Harness at the TCC PWM Solenoid Valve.
  2. Measure the resistance between each of the component terminals and the transmission case (ground).
Are both readings greater than the specified value?
250ohms
Go to Step 14
Go to Step 15

14

  1. Inspect the Automatic Transmission Wiring Harness for a short to ground.
  2. Repair the harness if necessary.
Refer to Electrical Diagnosis, Section 8.
Was a problem found and corrected?
--
Go to Step 17
--

15

Replace the TCC PWM Solenoid Valve.
Refer to Torque Converter Clutch Pulse Width Modulation Solenoid Valve Replacement, in On-Vehicle Service.
Is the replacement complete?
--
Go to Step 17
--

16

Replace the PCM.
Refer to Powertrain Control Module Replacement/Programming , Section 6.
Is the replacement complete?
--
Go to Step 17
--

17

  1. After the repair is complete, select DTC.
  2. Select Clear Info.
  3. Ensure the following conditions:
  4. ?€¢
    When you command the TCC PWM Solenoid Valve ON, the voltage drops to zero.


    ?€¢
    When you command the TCC PWM Solenoid Valve OFF, the voltage increases to B+.


    ?€¢
    All conditions met for 5 seconds.

  5. Select Specific DTC and enter DTC P1860.
Has the test run and passed?
--
System OK
Begin diagnosis the again. Go to Step 1

Jun 28, 2016 | Pontiac Cars & Trucks

1 Answer

P1860 CODE CHEVY S10 TRUCK 1998


Possible causes
- Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
- Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection

Aug 28, 2014 | Cars & Trucks

1 Answer

I have a 2001 caddy deville that i am buying there is a code that comes up P1860 can you tell me what that is Thank you Paul


Circuit Description with 4T80-E Automatic Transaxle
Ignition voltage is provided to the torque converter clutch pulse width modulated (TCC PWM) solenoid valve. The PCM controls the ON and OFF time of the solenoid by providing a ground through the output driver module (ODM) . The PCM uses a PWM duty cycle, in order to control application and release of the TCC. When the solenoid is commanded OFF, the PCM senses high volts. When the solenoid is commanded ON, the PCM senses low volts. If the PCM detects a continuous open, short to ground or short to voltage in the TCC PWM solenoid valve circuit, then DTC P1860 sets. DTC P1860 is a type B DTC.

Conditions for Running the DTC
  • The system voltage is 8-18 volts
  • The engine run time is greater than 5 seconds.
  • The TCC PWM solenoid valve duty cycle is 10% or less or 90% or greater.
Conditions for Setting the DTC
The TCC PWM solenoid valve feedback circuit indicates a continuous open, short to ground or short to voltage for 4.3 seconds.

Sep 23, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

ObdII code p1860


CODE PO1860 TCC PWM SOLENOID CIRCUIT MALFUNCTION CONDITIONS. POSSIBLE CAUSE FAULT IN TCC SOLENOID EITHER OPEN OR SHORT TO GROUND.CHECK TRANSMISSION FUSE.

Aug 05, 2010 | 1999 Chevrolet Cavalier

2 Answers

I put a used transmission in my 2002 Isuzu Rodeo and code P1860 came on how can I fixed the problem if there is one


CODE P1860 TORQUE CONVERTER CLUTCH PWM SOLENOID CIRCUIT MALFUNCTION. THE TCC PWM SOLENOID FAILED.

Jul 09, 2010 | Cars & Trucks

1 Answer

1998 buick lesabre custome obdII test type code is p1860 what is this?


P1860 TCC PWM Solenoid Circuit Electrical (GM)
this is a code saying the overdrive lock up soleniod
is not working properly

Mar 25, 2010 | 1998 Buick LeSabre

1 Answer

Servise engine light on the code is p1860


code - po1860 tcc pwm solenoid circuit malfunction 4t80- E conditions.5 possible causes 1. tcc solenoid control circuit is open or shorted to ground. 2.tcc solenoid control circuit is shorted to system power b+. 3.tcc solenoid power circuit is open check the trans fuse. 4.tcc solenoid is damaged or has failed. 5.pcm has failed.

Dec 07, 2009 | 2001 Cadillac DeVille

3 Answers

1999 chevy lumina 3.1 v6 code p1860


DTC P1860 is a type "A" DTC and indicates a torque converter clutch pulse width modulation solenoid electrical problem. When set it disables shift adapts and inhibits TCC functions such as the lock/unlock when in 4th-OD. Possible flaky TCC-PWM solenoid.
If you have a 4T65E the TCC-PWM solenoid is located under the side cover assembly. Not exactly easy to replace DIY. Engine/tranny has to be dropped down on the sub-frame assembly.

You could check the input voltage (12 volts) and ground/low to the solenoid via the main electrical connector. And check the resistance of the solenoid at the respective pins on the above connector. Not sure what the value is but you can get that from a transmission service shop or the dealer's manuel.

Assuming you have the 4T65E auto transaxle the 20 way electrical connector is located driver's side top. You should see it looking in. Gray connector and the only electrical plug going to the transmission. Twist counterclockwise. 

Other than checking the wire harness, and just an example once the solenoid is proven bad and replaced the local AAMCO charges around $500-$600 including the part but cost will vary depending on where you live. Good luck and sorry for the bad news. Keep me posted, be glad to help.

Jun 02, 2009 | 2002 Chevrolet Cavalier Coupe

1 Answer

Fault codes


DTC P1860 is set if PCM detects a continuous open or short to ground in the TCC PWM solenoid circuit.

If your inclinded to attempt to fix this yourself, I have some trouble shooting proceedures that you can use. They are very involved, and could require the trans oil pan to be removed to get access to the solenoid.

If your not up to that, take it in to get it fixed.

TCC PMW solenoid is used to control fluid flow acting on the converter clutch valve.
The Solenoid controls TCC apply and release.
The Solenoid is attached to the transmission valve body. To get to it you have to remove the tranmission oil pan. Changing it should be no problem.
But do you need to replace it? To determine that you have to figure out if it is the wiring that goes to the solenoid or if the solenoid itself is shot.


The PCM uses the TCC/PWM solenoid to control when the torque converter clutch applies and how soft or harsh the TCC apply feels to the customer. The TCC/PWM also controls the release feel of the torque converter clutch. "


Ignition voltage is supplied directly to the solenoid through a fused circuit. The Powertrain control module commands solenoid on or off by applying or removing the ground.


P0753 Shift Solenoid A Electrical P0758 Shift Solenoid B Electrical
Good luck and hope this helps

Apr 20, 2009 | 2002 Chevrolet Cavalier Coupe

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